Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun An extremely sensitive densitometer used to measure optical densities of photographic plates or film to detect small details, such as spectral lines invisible to the human eye.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun A very
sensitive densitometer used for detecting and measuring faintspectral lines
Etymologies
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Examples
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Ray and his team were not just taking pictures they were using all kinds of instruments including a magnetometer, gravimeter, microdensitometer, spectrometer etc.
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